Felclaw Marsuul
From Family Fighter. While most of the marsuul on Argus feed on fruits, this particular one prefers the juicy crunch of small rodents. Critter type. You can battle the Pets at any time, no World Quest requirement. Should take 180 Pet Battles in total to do all achievements with each type.
The 
Felclaw Marsuul is a Battle Pet reward from the Family Fighter achievement, earned during the Legion expansion by completing a series of pet battle challenges using all pet family types.
Guide awaiting review
Complete Family Fighter Achievement
Complete all ten sub-achievements of Family Fighter: Aquatic Assault, Critical Critters, Elemental Escalation, Humanoid Havoc, Mechanical Melee, Beast Blitz, Draconic Destruction, Fierce Fliers, Magical Mayhem, and Unstoppable Undead. These pet battles can be attempted at any time without a World Quest requirement active.
Prepare for All Encounters
All fights against Anom are single pet encounters, and completing every sub-achievement across all pet family types requires approximately 180 pet battles total.
Tips
The Felclaw Marsuul has Feign Death, which lets it dodge hard-hitting abilities and then swap in a faster pet to attack first — one of only a handful of pets in the game with this kind of ability.
